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Engine basics => Engine set up tips => Topic started by: Roger_Pion on February 22, 2009, 03:57:55 PM

Title: Grooves around the head - Someone's trademark?
Post by: Roger_Pion on February 22, 2009, 03:57:55 PM

Hey guys, I have two engines here that I know are reworked.  One's a Fox 35 with a red machined hemi head, angle plug.  The other is a ST 60.  For both the engines, the heads have two grooves machined around the circumference.  The ST also has a groove around the circumference of the thrust washer.

Is this any particular builder's trademark, does anyone know?

Regards,

Roger

Title: Re: Grooves around the head - Someone's trademark?
Post by: Herman Green on February 22, 2009, 04:25:53 PM

I have a big case fox Stunt .40 with two rings machined on the head that I bought from Big Art.

Herman

Title: Re: Grooves around the head - Someone's trademark?
Post by: Brett Buck on February 22, 2009, 04:52:16 PM

Quote from: Roger_Pion on February 22, 2009, 03:57:55 PM

the heads have two grooves machined around the circumference. 
Is this any particular builder's trademark, does anyone know?

  Yeah, Randy, anyone know who that might be?

    Brett

Title: Re: Grooves around the head - Someone's trademark?
Post by: RandySmith on February 22, 2009, 10:37:26 PM

Quote from: Brett Buck on February 22, 2009, 04:52:16 PM

  Yeah, Randy, anyone know who that might be?

    Brett

 LL~  Yep,   I think i have been cutting those for about  ummm 30 years  now   ::)

Randy

Title: Re: Grooves around the head - Someone's trademark?
Post by: Clint Ormosen on February 23, 2009, 03:49:57 AM

Randy, is the number of ring cut in the head "code" for anything or just decorative? Reason I ask is that some of the engines you worked for me have two rings, others have only one. Just curious.

Title: Re: Grooves around the head - Someone's trademark?
Post by: RandySmith on February 24, 2009, 10:30:24 PM

Quote from: Clint Ormosen on February 23, 2009, 03:49:57 AM

Randy, is the number of ring cut in the head "code" for anything or just decorative? Reason I ask is that some of the engines you worked for me have two rings, others have only one. Just curious.

Hi Clint

No , No code and it is never decorative. In order to make power engines generate heat, you need to disspell this heat quickly, the extra grooves  give more area to help cool the engine. The  groove, or "heatdam" cut around the glo plug helps to keep the only part of the heat you want to run hot, hot. Glo plugs run cleaner if they don't run cool, Aluminum heats act as a heatsink and pull heat from the plug, The heatdam machined around the glo plug just helps to keep a little more heat in the glo plug resulting in a cleaner run by making the plug hotter. Really nothing I do to engines is decorative, Except maybe the anodized ones, but,even the hundreds of anodized engines Ive done also is for cooling as there is evidence that it can help cooling

Regards
Randy

Title: Re: Grooves around the head - Someone's trademark?
Post by: Wayne J. Buran on February 25, 2009, 04:16:26 AM

Speaking of cooling or heating, now that the LA 46 is no longer available in the "Blue", has anyone noticed a differance in performance between the "Silver" and "Blue"?
Thanks
Wayne